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Date: Tue, 12 Sep 2017 18:30:14 +0200
From: Christoph Brinkhaus <c.brinkhaus@t-online.de>
To: freebsd-stable@freebsd.org
Subject: Re: 11.1 coredumping in sendfile, as used by a uwsgi process
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On Tue, Sep 12, 2017 at 04:29:49PM +0200, Mark Martinec wrote:

Hello Mark!
> 2017-09-12 15:46, Steven Hartland wrote:
> > Could you post the decoded crash info from /var/crash/...
> 
> Using crashinfo(8) I suppose?
> 
> > I would also create a bug report:
> > https://bugs.freebsd.org/bugzilla/enter_bug.cgi?product=Base%20System
> 
> Done (with additional info):
> 
>    Bug 222259 - 11.1-R crashing in sendfile syscall, as used by a uwsgi 
> process
>    https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222259
>
I have had issues on a quite weak system, it has 2G RAM.
Since FreeBSD-11.1 zfs arc is compressed by default which takes
some resources. With that feature disabled by
vfs.zfs.compressed_arc_enabled="0"
in /boot/loader.conf the system is as stable as it has been before.
I am not sure if there is a relation to your specific situation.

Kind regards,
Christoph